Natalie is married to Chad, who abandoned her in early June of 2019. She has not seen or communicated with him since then. She maintains a household in which she and her two dependent children live. Which of the following statements about Natalie's filing status in 2019 is correct? a. Natalie can file as a surviving spouse. b. Natalie can file a joint return with Chad. c. Natalie can file as a head of household. d. Natalie can use the rates for single taxpayers. e. None of these statements are appropriate.